The trail gator receiver kit set up an additional childs bike to fit in the tow bar the more the merrier so let everyone join in the fun of a great bike ride so when you are riding you can alternate between bikes so that everyone can enjoy being towed a great way to make a day out a day to remember trail gator receiver kit features sets up an additional childs bike for use with the tow bar alternate between bikes in no time only needed when wanting to tow additional chi